Brake-shoe.



No. 665,298. Patentedlan. l, |90I.

B. WOLHAUPTER.

BRAKE SHOE.

lic einmaA r 25 1900) (N M de|.`\ 2 Sheets-Sheat l.

No. 665,298. Patented lan. I', I90I. B. WULHAUPTER.

BRAKE SHOE.

(Application led Apr. 25, 1900.)

(N Mude'i.) 2 Sheath-Sheet 2.

Nrrnn TATES ArnN'r Frio.

BENJAMIN WOLHAUPTER, OF CHICAGO, ILLINOIS;

BRAKE-SHOE.

SPECIFICATION forming' part of Letters Patent No. 65,298, dated January 1, 190i.

Application filed .April 25, 1900. Serial No. 14j226. LNG model.)

To all whom it may concern.-

Be it known that VI, BENJAMIN WOLHAUP- TER, of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Brake Shoes; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

This invention relates to brake-shoes of that class having a composite wearing-face, the component parts of which diifer in character and wherein one of the elements constitu ting said component parts is disposed obliquel y or at au angle with respect to the wearing-face of the shoe, so that said element will constantly change or be shifted as wear on the shoe progresses.

The invention consists in the matters hereinafter described, and more fully pointed out in the appended claims.

In a brake-shoe embodying my invention one of the constituent parts or elements thereof has the form of a plurality of corrugated thin metal plates arranged parallel with each other and which are inserted in the body of the brake-shoe, said corrugated plates being so arranged with respect to the wearing-face or contact-surface of the shoe that all or nearly all parts of the thin metal constituting the corrugated plates shall haveoblique or angular relation to said wearing-face. Such angular relations of the thin metal of the plate to the Wearing-surface of the shoe may in carrying out my invention be secured by arranging the plates themselves at an angle to the said Wearing-face or by arranging the corrugations in the plate at an angle to the wearing-face, the general result being the same in both cases. The invention includes, however, certain specific features of construction with respect to the form and arrangement of said corrugated plates, as will hereinafter more fully appear.

My invention may be more readily understood by reference to the accompanying drawings, wherein-- Figure l is a face view of a brake-shoe embodying one form of my invention. Fig. 2 is a side view thereof with parts in section to show the interior construction. Fig. 3 is a perspective view of the insert-plates illustrated in Figs. 1 and 2. Fig. 4 illustrates a modified construction in the insert-plates. Fig. 5 illustrates a single insert-plate,showing a detail of construction forming part of the invention. Fig. 6 is a face view of a brakeshoe, showing corrugated plates of cast metal in said shoe. Fig. 7 is a side elevation of the same with parts in section. Fig. 8 is a face view of the cast-metal insert illustrated in Figs. 6 and 7. Fig. 9 is a sectional vie7 illustrating corrugated plates made integral with the body of the brake-shoe.

First referring to the construction shown in Figs. l to 3, inclusive, as illustrating one practical form of my invention, A indicates the body of the brake-shoe, which may be coustructed, as shown, of a single piece of cast metal. B B indicate a series of inserts cousisting of corrugated metal plates which are embedded in the metal constituting the body of the brake-shoe and which are arranged parallel with the side faces of the brake-shoe and parallel with each other. Said plates are corrugated obliquely or, in other Words, the corrugations thereof extend atan angle to the wearing-face of the brake-shoe, and the corrugations are oppositely directed in adjacent plates. The said plates B B are, moreover, arranged in contact with each other, or practically so, with the result that the sinuous contact-surfaces of said plates presented at the Wearing-surface of the brake-shoe cover practically the entire width of said wearingface, and thus give uniform wearing character to the portion of the same embraced within the outermost plates. The plates being arranged in contact with each other, moreover, by reason of the oblique and'opposite arrangement of corrugations on adjacent plates, said plates will touch only at the points Where the corrugations cross each other. By reason of the oblique arrangement of the corrugations in said plates described it is obvious that the wearing-surface afforded by the edges of said plates will constantly change in position as the wearing-face of the shoe becomes worn away by contact with the wheel. This may be better understood by consideration of lthe fact that the location and arrangement of the wearing faces or edges of the corrugated plates IOO shown in Fig. l are such as might appear before any wear has taken place upon the shoe, but that as wear progresses the sinuosities of the insert-plates appearing on the wearingface of the shoe will shift or move in a direction endwise of the shoe and in opposite directions in the case of two adjacent plates, so that when wear has progressed so far as to reach the contact-points of adjacent corrugations on two adjacent plates the sinuous lines on the surface of the shoe will approach and touch each other, or nearly so, instead of being parallel, as illustrated in Fig. l.

In Fig. et I have shown a construction in corrugated plates B B' like that shown in Fig. l, with the exception that the corrugations in the several plates are arranged in the same direction or parallel with each other in all the plates. 'lhis construction affords the same general advantages arising from the construction shown in Figs. l to l-that is t0 say, the wearing edges in said plates will constantly change or shift in a direction endwise of the brake-shoe as the surface thereof is worn away. Such construction, (shown in Fig. 4,) however, I consider not to be quite as desirable as that illustrated in Figs. l to 3, for the reason, among others, that the construction shown in Fig. 4, when the shoe consist-s of one piece of cast metal, requires some device for holding the plates in proper relative position at the time of casting the body of the shoe around the same, while in the construction shown in Figs. l to the plates are properly spaced by merely placing them in Contact with each other.

In Fig. 5 I have shown a single corrugated plate D, provided at its inner edge with laterally-bent lugs d d, formed by severing a portion of the metal constituting the plate at the inner margin thereof and bending the severed parts laterally, said lugs serving to securely hold or anchor the said plates in the mass of metal constituting the brake-shoe.

In Figs. (5, 7, and 8 I have shown a construction generally like that hereinbefore described, but in which the corrugated plates are made of cast metal instead of sheet metal. In this instance the several corrugated plates (indicated by C C) are arranged transversly of the wearing-face of the shoe, are disposed obliquely with respect to said wearing-face, and are provided with oblique corrugations, which are oppositely inclined or directed on adjacent plates. The plates are, moreover, in this instance shown as connected with each other by connecting-bars c c, made integral with the plates and extending longitudinally of the brake-shoe. Said connecting-bars constitute, with the plates, a single integral casting between and around which, if the brake-shoe be made of cast metal, the metal of the brake-shoe may be cast in constructing the same according to the plan illustrated in Figs. l to 5, or which may be used in connection with a cast-metal shell forming the body of the brake-shoe, as shown in said Figs. 6, 7, and 8, in which case a filling may be inserted between the corrugated plates, which filling may be of cast metal or other suitable material. The result produced in this case will be generally the same as in the construction hereinbefore described, it being obvious that as the face of the shoe wears away the exposed edges of the corrugated plates will change or shift in position or in their relation to the intervening parts of the wearing-face of the shoe. It will also be seen that in this construction, by reason of the inclined position of the plates, as well as the oblique arrangement of the corrugations, as wear takes place the exposed edges of the plates will shift or move endwise of the shoe, while the corrugations or folds will move or shift laterally of the shoe.

It maybe preferred in some instances that a series of corrugated plates joined to each other as described shall be used in connection with a filling of material other than the metal ofthe brake-slice or that such corrugated plates shall be formed integral with the metal constituting the body of the brakeshoe and a filling be inserted between the plates. A construction of this kind is shown in Fig. 9,wherein E indicates the body of the brake-shoe, which has the form of a hollow body or shell in which the corrugated plates F are arranged in the form of ribs on the back wall of the shell. In this construction the filling material (indicated by G) will be placed between the plates, so as to form, with the exposed edges of the plates, the wearing-` surface of the shoe. Such filling may be of cast metal of a character different from that of the plates, or it may be of some other material.

While in the accompanying drawings I have illustrated the corrugated plates as eX- tending longitudinally of the brake-shoe and also transversely thereto, yet instead of this particular arrangement of the plates the latter may be disposed angularly with respect to the side edges of the brake-shoe, and the plates themselves instead of being in allcases parallel with each other may be arranged in angular relation with respect to each other, the general result produced in these cases being the same as hereinbefore described.

It will be observed that, whether the plates themselves be inclined to the wearing-face or the plates be perpendicular to the wearingface and the corrugations inclined in either case, the longitudinal axes of said corrugations will be oblique to said wearing-face. The term longitudinal axes as herein used is intended to indicate lines parallel with the curved surfaces of the corrugations, and therefore serves to define the direction of said corrugations-as, for instance, if one bend or curve of the corrugated plate be considered as a cylindric segment, such segment itself may be arranged obliquely to the wearing- IOO IIO

face, either by an inclined arrangement of the plate itself when the corrugations are at right angles to the edgeof the plate or by an oblique arrangement of the corrugations when the plate itself is perpendicular to said wearing-face, and it follows that the longitudinal axes of said cylindric segments, as# sumed to constitute the corrugations, will be inclined with respect to the wearing-face whether the plates themselves as a whole be inclined with respect to said Wearing-face or not. sult of shifting or moving the wearing edges of the plate upon the wearing-face of the shoe is obtained, both when the corrugated plate is at right angles tothe wearing-face and when inclined with respect. thereto, provided the longitudinal axes of the corrugations be oblique to said Wearing-face, the construction in which the said longitudinal axes of the corrugations are inclined to the wearing-face is claimed, broadly, as my in vention,without restriction to the specific construction and arrangement of the corrugated plates -illustrated. Certain of said details of construction are, however, themselves of great practical value and are separately claimed as parts of my invention.

I claim as my inventionl. A brake-shoe embracing as a component part thereof, a corrugated lnetal plate having the longitudinal axes of its corrugations oblique with respect to the wearing-face of the shoe.

2. A brake-shoe embracing as a component part thereof, a plurality of corrugated metal Moreover, inasmuch as the desired replates in which the corrugations are oblique with respect to the wearing edges of the plates.

3. A brake-shoe embracing as a component part thereof, a plurality of corrugated metal plates,the corrugations of which are oblique to the wearing edges of the plates, and are oppositely inclined or directed in adjacent plates.

4. A brake-shoe embracing as a component part thereof, a plurality of corrugated plates extending parallel with the side edges of the shoe and forming with the intermediate portions of the shoe,a composite wearing-surface, said .plates being located at such distances from each other that the corrugations of each plate extend laterallyinto alinement with the corrugations of an adjacent plate and the said corrugations thereby cover all parts of the width of said composite wearing-surface.

5. A brake-shoe comprising as a component part thereof, a plurality of corrugated metal plates, arranged parallel with the side faces of the shoe, the corrugations of said plates being oblique with respect to the wearing edges thereof, and oppositely disposed or directed in adjacent plates, said plates being arranged with their corrugations in contact with each other.

In testimony that I claim the foregoing as my invention I affix my signature, in presence of two witnesses, this 23d day of April, A. D. 1900.

BENJAMIN WOLHAUPTER.

Witnesses:

C. CLARENCE PooLE, GERTRUDE BRYCE.

I ,A n l" 

